Back to Search Start Over

Terahertz holography for imaging amplitude and phase objects.

Authors :
Hack E
Zolliker P
Source :
Optics express [Opt Express] 2014 Jun 30; Vol. 22 (13), pp. 16079-86.
Publication Year :
2014

Abstract

A non-monochromatic THz Quantum Cascade Laser and an uncooled micro-bolometer array detector with VGA resolution are used in a beam-splitter free holographic set-up to measure amplitude and phase objects in transmission. Phase maps of the diffraction pattern are retrieved using the Fourier transform carrier fringe method; while a Fresnel-Kirchhoff back propagation algorithm is used to reconstruct the complex object image. A lateral resolution of 280 µm and a relative phase sensitivity of about 0.5 rad are estimated from reconstructed images of a metallic Siemens star and a polypropylene test structure, respectively. Simulations corroborate the experimental results.

Details

Language :
English
ISSN :
1094-4087
Volume :
22
Issue :
13
Database :
MEDLINE
Journal :
Optics express
Publication Type :
Academic Journal
Accession number :
24977861
Full Text :
https://doi.org/10.1364/OE.22.016079